/sys$common/syshlp/helplib.hlb DELETE, /INTRUSION_RECORD, Parameter  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 source

    Specifies the name of the device or the remote system where the
    user is attempting to log in. The source name can be presented
    in the syntax of another operating system domain, for example,
    one that is case sensitive or conflicts with DCL syntax rules.
    In such cases, you must enclose the source parameter in quotation
    marks.